1
Scope
2
References
3
Terms
and definitions
3.1
Definitions
3.2
Terms
defined in other Recommendations
3.3
Terms
defined in other standards
4
Abbreviations
5
General
considerations
5.1
Safety
considerations for avoiding damage to the human eye and skin
5.2
Considerations
to keep fibres damage-free
6
Procedures
and guidelines
6.1
General
6.2
APR
procedures for systems employing discrete optical amplification
6.3 APR procedures for systems
based upon distributed Raman amplification
Appendix I
– Examples of APR architectures for systems (including those based upon Raman
amplification) deploying an OAC
I.1
Considerations on using an OAC
instead of a restart pulse for automatic restart
I.2
Description of APR
procedure using co-propagating OSC
I.3
Description of APR procedure using
counter-propagating OSC
Appendix II
– Description of ALS/APSD procedures for single-channel point-to-point SDH
systems
II.1
Introduction
II.2
Single-channel
point-to-point SDH without line amplifiers
II.3
Single-channel
point-to-point SDH with line amplifiers